“They love to laugh and share a wicked sense of humour,” another insider said.

“It’s possible that this marriage would not have worked as well if they were in their 20s, but they aren’t. They are great friends and have total respect for each other.”

Aniston and Theroux have cemented their status as one of Hollywood’s cutest couples,coordinating their outfits, vacationing in France and gushing over each other.

Despite their busy schedules which often require the pair to part ways, Aniston and Theroux manage to maintain a healthy relationship — “Jen realised that you can be happily married without being together 24/7,” the Aniston insider added.

After time apart, “they have so much to catch up on and it makes their marriage more exciting,” the source adds. “Justin can still make Jen blush. She still talks about how she finds him very sexy. Not seeing each other every day makes them appreciate each other more.”